| Locality | Post Code |
|---|---|
| Avoca, Pottawattamie | 51521 |
| Carson, Pottawattamie | 51525 |
| Carter Lake, Pottawattamie | 51510 |
| Council Bluffs, Pottawattamie | 51501, 51503 |
| Crescent, Pottawattamie | 51526 |
| Elliott, Pottawattamie | 51532 |
| Griswold, Pottawattamie | 51535 |
| Hancock, Pottawattamie | 51536 |
| Henderson, Pottawattamie | 51541 |
| Honey Creek, Pottawattamie | 51542 |
| Lewis, Pottawattamie | 51544 |
| Macedonia, Pottawattamie | 51549 |
| Manawa, Pottawattamie | 51501 |
| McClelland, Pottawattamie | 51548 |
| Minden, Pottawattamie | 51553 |
| Missouri Valley, Pottawattamie | 51555 |
| Neola, Pottawattamie | 51559 |
| Oakland, Pottawattamie | 51560 |
| Shelby, Pottawattamie | 51570 |
| Silver City, Pottawattamie | 51571 |
| Treynor, Pottawattamie | 51575 |
| Underwood, Pottawattamie | 51576 |
| Walnut, Pottawattamie | 51577 |